Dude, where's my ninjas?

Yoof : Dude?Me : Yes?Yoof : Is all that ju-jitsu stuff you're doing real?Me : Of course.Yoof : I mean, could that black-belt guy take you down if he wanted to?Me : Believe me, he could.Yoof : Ah, it's just that it looks a bit Chuck Norris from where I'm sitting.